Rehearsal (3)
There were seven stages of Body Forging mastery in Knight Principal. They were Red Core, Orange Core, Yellow Core, Green Core, Blue Core, Violet Core, and Purple Core.
In each Core, there were three stages of latency, which were Early Stage, Middle Stage, and Late Stage.
Knight would undergo an astronomical power growth once they reached Yellow Core Stage. Because, they would be able to use Aura by then. Aura was Knight's specialty. It was a law defying ability unique only to Knight.
As the knowledge regarding Knight Principal was not very advanced, there were still many mysteries regarding the real identity of Aura. However, there was a suspicion that Knight Principal was a derivation of Daoism. Still, no one could confirm it.
In the other hand, Mage had nine levels of mastery. Starting from the First Circle to the Ninth Circle.